At the beginning of the fourteenth century, the Armagnacs reached the rank of great feudal lords with the legacy of the County of Rodez.
This heritage, combined with its Gascon lands, allowed the family to hold a rank of major importance in the heart of the nobility and, therefore, to ally itself to the royal House of France.
Between the fourteenth and fifteenth century, the Armagnacs came into possession of other territories including the counties of Charolais, La Marche, Pardiac, Castres, the land of Nemours elevated to a duchy, and the Carladez.
He died in 1418, leaving two sons: From the assassination of Louis d'Orléans in 1407 to the Treaty of Arras in 1435, the House of Armagnac supported French interests against the Dukes of Burgundy allied with the English.
At the end of the fifteenth century, the Armagnacs were claiming sovereign rights (coin money, take the qualification Counts by the grace of God), incurring the wrath of King Louis XI.
Cardinal Jouffroy ordered the apothecaries and the soldiers to force the unfortunate Countess to drink a potion to destroy her unborn child.
Jacques d'Armagnac, Duke of Nemours and Count John V were both targets of King Louis XI's deadly vengeance against the House of Armagnac.